Publisher: Hertie

Hertie was a German department store chain, and the site lists it among the sellers of one Atari 2600 cartridge: Bermuda. The game inside is Activision’s River Raid under another name. You fly a jet up a river, shoot ships, helicopters and bridges, and refuel by flying over fuel depots. The same cartridge was also sold by Suntek under the Rainbow Vision label.
You can try Bermuda below, right in your browser.